Found the Big Dryer Sheet guy! (/j)

but, seriously, the only people that don’t say that are the people making the dryer sheets… and they’re really not going to tell you not to use their product.

wax, historically, was used to weatherproof clothing prior to modern synthetics. It’s hydrophobic, meaning that it repels (or is repelled by,) water. applying that to a towel will absolutely make it less absorbent (and therefore suck at it’s job.)